Water return device and gas water heater

Abstract

The utility model relates to the technical field of gas water heaters, and discloses a water return device and a gas water heater. The water return device comprises a shell, a valve body assembly, a control assembly and a power supply assembly, the shell comprises an upper shell assembly and a lower shell assembly, the lower shell assembly is covered with the upper shell assembly, and a mounting groove is formed in one end of the lower shell assembly and located in the outer side of the upper shell assembly. The valve body assembly is arranged in a cavity defined by the upper shell assembly and the lower shell assembly, and a connector of the valve body assembly extends out of the shell. The control assembly is arranged in the upper shell assembly and used for controlling the valve body assembly. A key hole is formed in the top of the upper shell assembly, the control assembly comprises a control panel and a key assembly, the valve body assembly is electrically connected with the control panel, the control panel is electrically connected with the key assembly, and the key assembly is installed in the key hole through a sealing sleeve. One end of the power supply assembly is in sealed connection with the mounting groove, and the power supply assembly is electrically connected with the control assembly through a wire. The water return device is simple in structure and convenient to install; the long-term stable use can be realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas water heater technical field especially relates to a backwater device and gas water heater. BACKGROUND

[0002] In order to improve gas water heater use zero cold water function, preheating time is long, gas consumption is big, cold water pipe out hot water and with cold water water heater start etc. problem, usually increase backwater device on the cold hot water pipe of gas water heater, backwater device sets up in the most remote end water point, and backwater device includes remote temperature sensor, electric cut -off valve, check valve and control assembly. The on-off of electric cut -off valve is controlled through control assembly, makes the water in cold hot water pipe completely isolated, guarantees the user to use the comfortable hot water at each hot water tap, and guarantees that the user uses the real cold water at cold water tap, and when using cold water, hot water heater will not be frequently started.

[0003] Backwater device installation scene is mostly the cabinet position below the washbasin of bathroom, and the environment of bathroom is humid, and control assembly and power supply assembly are exposed in humid environment for a long time, influence backwater device long -term stable use. UTILITY MODEL CONTENTS

[0004] The first technical problem solved by the utility model is to provide a backwater device, which can effectively solve the problem of shortened service life in a humid environment, make the backwater device easy to install, and stable to use in a humid environment.

[0005] The second technical problem solved by the utility model is to provide a gas water heater, which can effectively solve the problem of shortened service life of the backwater device of the existing gas water heater in a humid environment, and improve the use stability of the gas water heater.

[0006] The first technical problem is solved by the following technical scheme:

[0007] The backwater device comprises:

[0008] The shell comprises an upper shell assembly and a lower shell assembly, the upper shell assembly covers the lower shell assembly, one end of the lower shell assembly is provided with a mounting groove, and the mounting groove is located on the outer side of the upper shell assembly;

[0009] The valve body assembly is arranged in the cavity formed by the upper shell assembly and the lower shell assembly, and the interface of the valve body assembly extends out of the shell;

[0010] A control assembly is arranged in the upper shell assembly for controlling the valve body assembly; a top portion of the upper shell assembly is provided with a button hole, the control assembly comprises a control panel and a button assembly, the valve body assembly is electrically connected with the control panel, the control panel is electrically connected with the button assembly, and the button assembly is installed in the button hole through a sealing sleeve;

[0011] A power supply assembly is sealingly connected with the mounting groove at one end, and is electrically connected with the control assembly through a wire.

[0012] Compared with the background art, the water return device has the beneficial effects that:

[0013] The water return device comprises a shell, a valve body assembly, a control assembly and a power supply assembly, the upper shell assembly cover is arranged on the lower shell assembly, the valve body assembly and the control assembly are arranged in a cavity formed by the upper shell assembly and the lower shell assembly, and the button assembly is installed in a button hole at the top of the upper shell assembly through a sealing sleeve, so that the user can control the valve body assembly through the button assembly, and the control assembly is sealed and protected at the same time. One end of the power supply assembly is sealingly connected with the mounting groove on the lower shell assembly outside the upper shell assembly, and the power supply assembly is electrically connected with the control assembly in the cavity through a wire, so as to provide electric energy for the control assembly and ensure the sealing property of the power supply assembly. The water return device has a simple structure, the interface of the valve body assembly extends out of the shell, and is convenient to install; the control assembly and the power supply assembly are separately arranged and are well sealed and protected; the power supply assembly is arranged outside the upper shell assembly, so that the power supply assembly is connected with an external power supply or is separately disassembled and replaced, and the water return device is ensured to be used stably for a long time.

[0014] In one embodiment, the power supply assembly comprises a shell and a lithium battery, one end of the shell is provided as an opening, one end of the lithium battery is arranged in the shell, and the other end extends out of the shell from the opening; a side wall of one end of the shell close to the opening is provided with a clamping piece, a side wall of the mounting groove is provided with a clamping groove, and one end of the lithium battery extending out of the shell is arranged in the mounting groove, and the clamping piece is clamped with the clamping groove.

[0015] In one embodiment, a sealing ring is arranged around one end of the lithium battery extending out of the shell, and the sealing ring is interference-fitted with an inner wall of the mounting groove.

[0016] In one embodiment, a charging port is arranged on a side of the shell away from the lower shell assembly, the charging port is arranged corresponding to a power supply interface on the lithium battery, and the charging port is selectively closed by a rubber plug.

[0017] In one of the embodiments, a spring assembly is arranged at the bottom of the mounting groove, the power supply assembly abuts against the spring assembly, the spring assembly is electrically connected with the control panel through the wire, a through hole is arranged on the wall of the mounting groove for the wire to pass through, and the through hole is in sealed connection with the wire.

[0018] In one of the embodiments, a sealing gasket is arranged in the through hole, a wire passing hole is arranged on the sealing gasket, the wire passes through the wire passing hole to be electrically connected with the control panel, and sealing glue is coated between the wire passing hole and the wire.

[0019] In one of the embodiments, the sealing sleeve is sleeved on the lower outer periphery of the key assembly, the sealing sleeve comprises a supporting portion, a connecting portion and an abutting portion, the outer diameter of the supporting portion is greater than the outer diameter of the abutting portion, the outer diameter of the connecting portion is smaller than the outer diameter of the abutting portion, and the connecting portion is arranged between the supporting portion and the abutting portion.

[0020] The key hole is arranged as a first stepped hole, the smaller diameter hole in the first stepped hole is arranged close to the control panel, the supporting portion is arranged in the larger diameter hole in the first stepped hole and is in interference fit with the larger diameter hole, for supporting the upper part of the key assembly, the connecting portion passes through the smaller diameter hole in the first stepped hole and is in interference fit with the smaller diameter hole, the abutting portion extends into the cavity and abuts against the control panel, the lower part of the key assembly passes through the communication hole at the center of the abutting portion and is electrically connected with the control panel, and the key assembly is in interference fit with the communication hole.

[0021] In one of the embodiments, an indicating lamp is arranged on the control panel, a light transmission hole is further arranged on the top of the upper shell assembly, the light transmission hole is arranged corresponding to the indicating lamp, a light guide column is arranged in the light transmission hole, and the light guide column is in interference fit with the light transmission hole.

[0022] In one of the embodiments, the control assembly further comprises a mounting frame, and the mounting frame is connected with the upper shell assembly.

[0023] The mounting frame is arranged as a U-shaped frame, the control panel is arranged in the U-shaped frame, the opening end of the U-shaped frame is arranged towards the top of the upper shell assembly, and a sealing member is arranged between the opening end of the U-shaped frame and the top of the upper shell assembly.

[0024] The second technical problem is solved by the following technical scheme:

[0025] The gas water heater comprises the water return device according to any one of the preceding schemes.

[0026] Compared with the background art, the gas water heater provided by the utility model has the beneficial effects that:

[0027] The gas water heater provided by the utility model has the water returning device, and the installation convenience of the gas water heater is improved; meanwhile, the long-term stable operation of the gas water heater is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the description of the embodiments of the utility model will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the contents of the embodiments of the utility model and the drawings by those skilled in the art without any creative labor.

[0029] Figure 1 It is the principle diagram of the water returning device provided by the embodiment of the utility model for the gas water heater;

[0030] Figure 2 It is the front view of the water returning device provided by the embodiment of the utility model;

[0031] Figure 3 It is the top view of the water returning device provided by the embodiment of the utility model;

[0032] Figure 4 It is the exploded schematic view of the water returning device provided by the embodiment of the utility model;

[0033] Figure 5 It is the side view of the power supply assembly provided by the embodiment of the utility model;

[0034] Figure 6 It is the sectional view of the lower shell assembly provided by the embodiment of the utility model;

[0035] Figure 7 It is the bottom view of the power supply assembly provided by the embodiment of the utility model;

[0036] Figure 8 It is the sectional view of the upper shell assembly provided by the embodiment of the utility model;

[0037] Figure 9 It is Figure 8 The local enlarged view of A in the figure.

[0038] Label explanation:

[0039] 100, gas water heater; 101, cold water pipe; 102, hot water pipe; 103, water returning device;

[0040] 201, first water tap; 202, second water tap; 203, third water tap;

[0041] 1, upper shell assembly; 11, upper cover; 111, first protrusion; 1111, key hole; 112, second protrusion; 1121, light transmission hole; 113, clamping strip; 114, third protrusion; 1141, fourth threaded hole; 12, first connecting sleeve; 121, second threaded hole; 13, light guide column; 14, sealing sleeve; 141, support part; 142, connecting part; 143, abutting part;

[0042] 2, lower shell assembly; 21, lower shell; 211, mounting cavity; 212, mounting groove; 2121, clamping groove; 2122, third threaded hole; 22, second connecting sleeve; 23, spring assembly; 231, spring; 232, mounting plate; 2321, first countersunk hole; 24, sealing gasket; 25, third fixing screw; 26, protruding plate; 261, mounting hole; 27, reinforcing rib; 28, second fixing screw;

[0043] 3, valve body assembly; 31, hot water inlet; 32, cold water inlet; 33, hot water outlet; 34, cold water outlet; 35, first fixing screw;

[0044] 4, control assembly; 41, control panel; 42, key assembly; 43, mounting frame; 431, second countersunk hole; 44, fourth fixing screw;

[0045] 5, power supply assembly; 51, housing; 511, clamping piece; 5111, connecting plate; 5112, clamping hook; 5113, pressing part; 512, rubber plug; 513, bayonet; 52, lithium battery; 521, positive terminal; 522, negative terminal; 523, sealing groove; 53, sealing ring;

[0046] 6, sealing member. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be described clearly and completely in the description of the embodiments of the present application in combination with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0048] In the description of the present application, it should be understood that the positions or location relationships indicated by the terms "inner", "outer" and the like are based on the positions or location relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular position, be constructed and operated in a particular position, and therefore cannot be understood as a limitation on the present application.

[0049] The terms "first", "second", "third", etc. are used only for the purpose of description, and should not be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features.

[0050] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above-mentioned term in the present application can be understood according to the specific circumstances.

[0051] As shown in Figures 1-8 The present embodiment provides a gas water heater, which comprises a cold water pipe 101 and a hot water pipe 102, the cold water pipe 101 provides cold water for a first water tap 201, a second water tap 202 and a third water tap 203 respectively, and the hot water pipe 102 provides hot water for the first water tap 201, the second water tap 202 and the third water tap 203 respectively. When the zero-cold-water function is used at the third water tap 203 which is far away from the gas water heater 100, problems such as long preheating time, large gas consumption, hot water from the cold water pipe 101 and cold water water heater start-up are prone to occur. In order to solve the above technical problems, a backwater device 103 is usually added to the cold and hot water pipes of the third water tap 203, the backwater device 103 comprises a valve body assembly 3, a control assembly 4 and a power supply assembly 5, the valve body assembly 3 is connected to the cold and hot water pipes, the control assembly 4 controls the on-off of the valve body assembly 3, and the power supply assembly 5 provides power for the control assembly 4, so that the water in the cold and hot water pipes is completely isolated, ensuring that the user uses comfortable hot water at each hot water tap, and ensuring that the user uses truly cold water at the cold water tap; and the gas water heater 100 will not start frequently when cold water is used.

[0052] Since the installation scene of the backwater device 103 is usually the cabinet position below the washbasin in the bathroom, the installation position is narrow in space, and the existing backwater device 103 has many parts, which is inconvenient to install. At the same time, the environment in the bathroom is humid, and the control assembly 4 and the power supply assembly 5 are exposed to the humid environment for a long time, which will affect the long-term stable use of the backwater device 103.

[0053] In order to solve the above technical problems, as shown in Figures 2-9As shown, the embodiment provides a backwater device 103, which comprises a shell, a valve body assembly 3 and a power supply assembly 5. The shell comprises an upper shell assembly 1 and a lower shell assembly 2, the upper shell assembly 1 covers the lower shell assembly 2, and the upper shell assembly 1 and the lower shell assembly 2 enclose a cavity, the valve body assembly 3 is arranged in the cavity, the interface of the valve body assembly 3 extends out of the shell, and the installation is convenient; a control assembly 4 is arranged in the upper shell assembly 1 and used for controlling the valve body assembly 3. One end of the lower shell assembly 2 is provided with a mounting groove 212, the mounting groove 212 is located outside the upper shell assembly 1, one end of the power supply assembly 5 is sealingly connected with the mounting groove 212, and the power supply assembly 5 is electrically connected with the control assembly 4 through a wire, the power supply assembly 5 provides electric energy for the control assembly 4, and is arranged outside the cavity, after one end of the power supply assembly 5 is sealingly connected with the mounting groove 212, waterproof sealing can be realized, and the power supply assembly 5 is prevented from being affected by a humid environment; at the same time, the power supply assembly 5 is convenient to connect with an external power supply for charging, without separately wiring in an installation environment, and the aesthetic property of the installation environment is affected; and the power supply assembly 5 can be separately disassembled and replaced, and can provide continuous electric energy for the backwater device 103.

[0054] With reference to Figure 3 and Figure 4 continuously, one end of the lower shell assembly 2 away from the mounting groove 212 is provided with a mounting cavity 211, the valve body assembly 3 is arranged in the mounting cavity 211, and two sides of the valve body assembly 3 are each provided with two interfaces extending outside the lower shell assembly 2, one side of the two interfaces is a cold water inlet 32 and a hot water inlet 31, and the other side of the two interfaces is a cold water outlet 34 and a hot water outlet 33, the cold water inlet 32 and the cold water outlet 34 are used for connecting a cold water pipe 101, and the hot water inlet 31 and the hot water outlet 33 are used for connecting a hot water pipe 102. After the valve body assembly 3 of the backwater device 103 is mounted in the mounting cavity 211, the upper shell assembly 1 and the lower shell assembly 2 are connected, and then one end of the power supply assembly 5 is mounted in the mounting groove 212, and the integration can be realized, when installation, four interfaces are connected with the cold water pipe 101 and the hot water pipe 102 respectively, and the structure is simple and the installation is convenient.

[0055] Specifically, with reference to Figure 6 and Figure 8, the bottom of the installation cavity 211 is provided with a first threaded hole, the valve body assembly 3 is connected with the first threaded hole through a first fixing screw 35, so as to fix the valve body assembly 3 on the bottom of the installation cavity 211. The upper shell assembly 1 comprises an upper cover 11 with an open lower end and a first connecting sleeve 12 arranged in the upper cover 11. The lower shell assembly 2 comprises a lower shell 21 with an open upper end and a second connecting sleeve 22 arranged at both ends of the installation cavity 211. The first connecting sleeve 12 and the second connecting sleeve 22 are arranged one by one, the second connecting sleeve 22 penetrates the bottom of the lower shell 21, and the first connecting sleeve 12 is provided with a second threaded hole 121. A second fixing screw 28 enters the second connecting sleeve 22 from the bottom of the lower shell 21 and extends out of the second connecting sleeve 22 to be screwed with the second threaded hole 121, so as to fixedly connect the lower shell 21 and the upper cover 11. After the lower shell 21 and the upper cover 11 are fixedly connected, the open lower end of the upper cover 11 is butted with the open upper end of the lower shell 21, and the butted part of the upper cover 11 and the lower shell 21 is provided with two oppositely arranged semicircular holes, which form an avoiding hole of the avoiding interface.

[0056] Continuing to refer to Figure 4 and Figure 5 , the height of the installation cavity 211 is lower than the height of the installation groove 212, the side of the upper cover 11 close to the installation groove 212 is provided with a notch butting with the side wall of the installation groove 212, the outer side wall above the notch is provided with a clamping strip 113, the power supply assembly 5 is provided with a clamping hole 513 clamping with the clamping strip 113, one end of the power supply assembly 5 is installed in the installation groove 212, the clamping hole 513 is clamped with the clamping strip 113, and the top of the upper cover 11 is flush with the top of the power supply assembly 5, so that the integrated backwater device 103 has a regular rectangular shape.

[0057] The bottom of the lower shell 21 is provided with a lug 26 on both sides along the length direction, the lug 26 is provided with a mounting hole 261, and a mounting bolt is used to fix the backwater device 103 to the installation position through the mounting hole 261. Further, a reinforcing rib 27 is arranged between the lug 26 and the side wall of the lower shell 21, so as to ensure the strength of the lug 26.

[0058] Continuing to refer to Figure 8 and Figure 9 , the top of the upper shell assembly 1 is provided with a key hole 1111, the control assembly 4 comprises a control panel 41 and a key assembly 42, the valve body assembly 3 is electrically connected with the control panel 41, the control panel 41 is electrically connected with the key assembly 42, and the key assembly 42 is installed in the key hole 1111 through the sealing sleeve 14. The control assembly 4 is arranged on the upper shell assembly 1, so as to facilitate the user to control the valve body assembly 3 through the key assembly 42. The control assembly 4 and the power supply assembly 5 are separately placed and well sealed and protected. The power supply assembly 5 is connected with the external power supply or is separately disassembled and replaced, so as to ensure the long-term stable use of the backwater device 103.

[0059] In an embodiment, continuing to refer to Figure 4 and Figure 5 , the power supply assembly 5 comprises a shell 51 and a lithium battery 52, one end of the shell 51 is provided as an opening, one end of the lithium battery 52 is arranged in the shell 51 and the other end extends out of the shell 51 from the opening, the side wall of the shell 51 near the opening is provided with a clamping piece 511, the side wall of the mounting groove 212 is provided with a clamping groove 2121, the end of the lithium battery 52 extending out of the shell 51 is arranged in the mounting groove 212, and the clamping piece 511 is clamped with the clamping groove 2121. The lithium battery 52 is selected for the power supply assembly 5, which has large capacity and long endurance time. The end of the lithium battery 52 extending into the shell 51 is connected with the shell 51 by clamping or plugging, etc. The shell 51 is used to protect the part of the lithium battery 52 outside the mounting groove 212, so as to avoid the part of the lithium battery 52 outside the mounting groove 212 from being affected by the humid environment and performance degradation; at the same time, the clamping piece 511 arranged on the shell 51 is used to clamp and fix the power supply assembly 5 with the lower shell 21.

[0060] Further, the side of the shell 51 away from the lower shell assembly 2 is provided with a charging port, which is arranged corresponding to the power supply interface on the lithium battery 52, and the charging port is selectively closed by a rubber plug 512. The power supply assembly 5 can be charged without disassembly, and the external power supply is connected with the power supply interface on the lithium battery 52 through the charging port, so as to charge the lithium battery 52. Of course, the power supply assembly 5 can be first taken out from the mounting groove 212 for charging, and then installed into the mounting groove 212 after charging. In use of the water return device 103, in order to prevent moisture and water, the charging port is closed by the rubber plug 512 to ensure the use performance of the lithium battery 52.

[0061] Specifically, the shell 51 is snap-connected with the upper shell assembly 1, the snap part 511 is arranged in an integral structure with the shell 51, and the shell 51 is made of plastic with certain elasticity. The snap part 511 comprises a connecting plate 5111 and a snap hook 5112, the snap hook 5112 is connected to the lower side of the connecting plate 5111, and the remaining three sides of the connecting plate 5111 are bently connected with the side wall of the shell 51, so that the connecting plate 5111 can have certain deformation amount relative to the side wall of the shell 51. The connecting plate 5111 is provided with a pressing part 5113, and the connecting plate 5111 moves inward relative to the shell 51 by pressing the pressing part 5113, so that the snap hook 5112 can be offset to the inner side of the shell 51 along with the connecting plate 5111. When the power supply assembly 5 is installed in the installation groove 212, the end of the lithium battery 52 extending out of the shell 51 is inserted into the installation groove 212, the snap hook 5112 is pressed downward by the inner wall of the installation groove 212, and when it is moved into the clamping groove 2121, it is clamped into the clamping groove 2121 under the action of elasticity, so as to snap-fix the power supply assembly 5 with the installation groove 212. When the power supply assembly 5 is disassembled, the pressing part 5113 is pressed, so that the snap hook 5112 moves to the inner side of the shell 51, thereby disengaging the snap connection with the clamping groove 2121. After the snap hook 5112 disengages the snap connection with the clamping groove 2121, the power supply assembly 5 is lifted upward, and then the power supply assembly 5 can be taken out of the installation groove 212.

[0062] It should be noted that when the power supply assembly 5 is installed in the installation groove 212, a certain gap is left between the snap hook 5112 and the lithium battery 52 to provide a moving space for the snap hook 5112 to move to the inner side of the shell 51.

[0063] In an embodiment, the end of the lithium battery 52 extending out of the shell 51 is provided with a sealing ring 53 in the circumferential direction, and the sealing ring 53 is in interference fit with the inner wall of the installation groove 212. The lithium battery 52 is provided with a sealing groove 523 in the outer periphery, and the sealing ring 53 is snap-connected in the sealing groove 523. After the lithium battery 52 enters the installation groove 212, the sealing ring 53 is in interference fit with the inner wall of the installation groove 212, which can prevent external water from entering the lithium battery 52 through the interface between the shell 51 and the installation groove 212 to affect the performance of the lithium battery 52.

[0064] In an embodiment, continuing to refer to Figure 6 and Figure 7The bottom of the installation groove 212 is provided with a spring assembly 23, the power supply assembly 5 abuts against the spring assembly 23, the spring assembly 23 is electrically connected with the control panel 41 through a wire, the groove wall of the installation groove 212 is provided with a through hole through which the wire passes, and the through hole is in sealed connection with the wire. The positive terminal 521 and the negative terminal 522 of the lithium battery 52 both abut against the spring assembly 23, so that the spring assembly 23 is electrified, and the electric energy of the lithium battery 52 is supplied to the control panel 41 through the spring assembly 23 and the wire. Meanwhile, when the power supply assembly 5 is installed, the spring assembly 23 has a buffering effect on the lithium battery 52, and is used for supporting the lithium battery 52, preventing the lithium battery 52 from being in direct hard contact with the bottom of the installation groove 212 and being damaged due to excessive force.

[0065] The spring assembly 23 comprises a spring 231 and a mounting plate 232, the spring 231 is connected to the center of the mounting plate 232, the wire is in conductive connection with the spring 231, the mounting plate 232 is provided with a first countersunk hole 2321, the bottom of the installation groove 212 is provided with a third threaded hole 2122, and a third fixing screw 25 is screwed through the first countersunk hole 2321 and the third threaded hole 2122, so as to fix the spring assembly 23 to the bottom of the installation groove 212. The wire enters the cavity through the through hole and is electrically connected with the control panel 41 close to the top of the upper cover 11.

[0066] In an embodiment, the through hole is provided with a sealing gasket 24, the sealing gasket 24 is provided with a wire passing hole, the wire passes through the wire passing hole and is electrically connected with the control panel 41, and sealing glue is coated between the wire passing hole and the wire. Since the valve body assembly 3 is connected with the cold water pipe 101 and the hot water pipe 102 through the interfaces, in order to prevent water in the valve body assembly 3 from leaking into the installation cavity 211, water in the installation cavity 211 enters the installation groove 212 through the through hole and affects the lithium battery 52. The sealing gasket 24 is arranged in the through hole, and sealing glue is coated between the wire passing hole and the wire after the wire passes through the wire passing hole of the sealing gasket 24, so as to guarantee the waterproof performance of the lithium battery 52.

[0067] In an embodiment, the control panel 41 is provided with an indicating lamp, the top of the upper shell assembly 1 is further provided with a light transmission hole 1121 corresponding to the indicating lamp, the light transmission hole 1121 is provided with a light guide column 13, the light guide column 13 is in interference fit with the light transmission hole 1121, so as to guarantee that external water cannot enter the cavity through the light transmission hole 1121 and affect the performance of the control panel 41. After the indicating lamp is lighted, the light emitted by the indicating lamp is transmitted out of the upper shell assembly 1 through the light guide column 13 and the light transmission hole 1121, so as to be convenient for a user to observe.

[0068] In particular, continuing to refer to Figure 8 and Figure 9The top inner wall of the upper cover 11 is provided with a first protrusion 111 and a second protrusion 112, a key hole 1111 penetrates the first protrusion 111, and a light transmission hole 1121 penetrates the second protrusion 112. Such a structure can increase the depth of the key hole 1111 and the light transmission hole 1121, i.e., increase the contact area between the sealing sleeve 14 and the key hole 1111 and the contact area between the light guide column 13 and the light transmission hole 1121, thereby enhancing the waterproof effect.

[0069] Further, the sealing sleeve 14 is sleeved on the lower outer periphery of the key assembly 42, and the sealing sleeve 14 comprises a supporting portion 141, a connecting portion 142 and an abutting portion 143. The outer diameter of the supporting portion 141 is greater than the outer diameter of the abutting portion 143, the outer diameter of the connecting portion 142 is smaller than the outer diameter of the abutting portion 143, and the connecting portion 142 is arranged between the supporting portion 141 and the abutting portion 143. The key hole 1111 is arranged as a first stepped hole, and the smaller-diameter hole in the first stepped hole is arranged close to the control panel 41. The supporting portion 141 is arranged in the larger-diameter hole in the first stepped hole and is in interference fit with the larger-diameter hole, for supporting the upper part of the key assembly 42. The connecting portion 142 penetrates the smaller-diameter hole in the first stepped hole and is in interference fit with the smaller-diameter hole. The abutting portion 143 extends into the cavity and abuts against the control panel 41. The key assembly 42 is electrically connected to the control panel 41 through the communication hole at the center of the abutting portion 143, and the key assembly 42 is in interference fit with the communication hole. The interference fit between the sealing sleeve 14 and the first stepped hole forms two seals. Meanwhile, the key assembly 42 and the sealing sleeve 14 form another seal, thereby protecting the control panel 41 through three seals, preventing external water from entering the cavity through the key hole 1111 to affect the control panel 41.

[0070] Further, the longitudinal section of the abutting portion 143 is trapezoidal. The shorter base of the abutting portion 143 abuts against the control panel 41, and the diameter of the longer base of the abutting portion 143 is greater than the diameter of the communication hole, thereby limiting the upward movement of the sealing sleeve 14 and preventing the key assembly 42 from moving upward and being disconnected from the control panel 41, thereby ensuring the reliability of the connection between the key assembly 42 and the control panel 41.

[0071] In an embodiment, the light transmission hole 1121 is arranged as a second stepped hole. The larger-diameter hole of the second stepped hole is arranged close to the control panel 41, and the depth of the larger-diameter hole of the second stepped hole is greater than the depth of the smaller-diameter hole. The light guide column 13 is in interference fit with the larger-diameter hole of the second stepped hole and abuts against the stepped surface of the second stepped hole. Such a structure forms a first seal between the stepped surface of the second stepped hole and the end surface of the light guide column 13, and forms a second seal between the circumferential surface of the light guide column 13 and the inner wall of the larger-diameter hole of the second stepped hole. Through the two seals, the control panel 41 is protected, preventing external water from entering the cavity through the light transmission hole 1121 to affect the control panel 41.

[0072] In an embodiment, the control assembly 4 further comprises a mounting frame 43, the control panel 41 is arranged in the mounting frame 43, and the mounting frame 43 is connected with the upper shell assembly 1. The control panel 41 is supported by the mounting frame 43, and a third protrusion 114 is further arranged on the inner wall of the top of the upper cover 11. A fourth threaded hole 1141 which is not penetrated to the outside is arranged in the third protrusion 114, and a second countersunk hole 431 is correspondingly arranged on the mounting frame 43. A fourth fixing screw 44 is screwed through the second countersunk hole 431 and the fourth threaded hole 1141. The third protrusion 114 is arranged to leave a certain accommodation space between the mounting frame 43 and the top of the upper cover 11. The control panel 41 is arranged on the side of the mounting frame 43 facing the accommodation space, so that the light source on the control panel 41 faces the light guide column 13 on the top of the upper cover 11, and the control panel 41 can be electrically connected with the key assembly 42.

[0073] In an embodiment, the mounting frame 43 is arranged as a U-shaped frame, the control panel 41 is arranged in the U-shaped frame, the opening end of the U-shaped frame is arranged towards the top of the upper shell assembly 1, and a sealing member 6 is arranged between the opening end of the U-shaped frame and the top of the upper shell assembly 1. When the U-shaped frame is fixed with the upper cover 11 by the fourth fixing screw 44, the end face of the opening end of the U-shaped frame tightly presses the sealing member 6 against the inner wall of the top of the upper cover 11. The arrangement of the sealing member 6 can prevent the water vapor leaked from the valve body assembly 3 in the cavity from rising to the top of the cavity, and the condensed water vapor falling on the control panel 41.

[0074] The water return device 103 provided in the embodiment is suitable for being installed in a humid environment such as a bathroom. On the one hand, the power supply assembly 5 is separately arranged from the control assembly 4, which does not affect the separate disassembly and replacement of the power supply assembly 5, facilitates the charging of the power supply assembly 5, and does not need to be wired in the bathroom, thereby ensuring the aesthetic appearance of the bathroom. On the other hand, the control assembly 4 and the power supply assembly 5 are respectively sealed and protected, which can ensure the long-term stable use of the water return device 103 in the humid environment. The gas water heater 100 using the above-mentioned water return device 103 improves the installation convenience and use stability.

[0075] In the specific contents of the above specific embodiments, any non-contradictory combination of technical features can be made. In order to make the description simple, not all possible combinations of the above technical features are described, but as long as the combination of these technical features does not exist, it should be considered as the scope of the description.

[0076] The specific contents of the foregoing specific embodiments are only to express several embodiments of the utility model, and the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent scope. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A backwater device, characterized in that The utility model provides a kind of valve, including: Shell, including upper shell assembly (1) and lower shell assembly (2), the upper shell assembly (1) covers the lower shell assembly (2), one end of the lower shell assembly (2) is provided with mounting groove (212), the mounting groove (212) is located outside the upper shell assembly (1); Valve body assembly (3), is located in the cavity formed by the upper shell assembly (1) and the lower shell assembly (2), the interface of the valve body assembly (3) is out of the shell; Control assembly (4), is located in the upper shell assembly (1), for controlling the valve body assembly (3);The top of the upper shell assembly (1) is provided with button hole (1111), the control assembly (4) includes control panel (41) and button assembly (42), the valve body assembly (3) is electrically connected with the control panel (41), the control panel (41) is electrically connected with the button assembly (42), and the button assembly (42) is installed in the button hole (1111) by sealing sleeve (14); Power supply assembly (5), one end of the power supply assembly (5) is sealingly connected with the mounting groove (212), and the power supply assembly (5) is electrically connected with the control assembly (4) by wire.

2. A water return device according to claim 1, characterised in that The power supply assembly (5) includes shell (51) and lithium battery (52), one end of the shell (51) is provided as opening, one end of the lithium battery (52) is located in the shell (51), the other end is out of the shell (51) from the opening, the side wall of the shell (51) near one end is provided with clamping piece (511), the side wall of the mounting groove (212) is provided with clamping groove (2121), one end of the lithium battery (52) out of the shell (51) is placed in the mounting groove (212), the clamping piece (511) is clamped with the clamping groove (2121).

3. A water return device according to claim 2, characterised in that The periphery of one end of the lithium battery (52) out of the shell (51) is provided with sealing ring (53), and the sealing ring (53) is interference-fitted with the inner wall of the mounting groove (212).

4. The water return device of claim 2, wherein The side of the shell (51) away from the lower shell assembly (2) is provided with charging port, the charging port is provided corresponding to the power interface on the lithium battery (52), and the charging port is selectively closed by rubber plug (512).

5. The water return device of claim 1, wherein The bottom of the mounting groove (212) is provided with spring assembly (23), the power supply assembly (5) abuts against the spring assembly (23), the spring assembly (23) is electrically connected with the control panel (41) by the wire, and the slot wall of the mounting groove (212) is provided with through hole for the wire to pass through, and the through hole is sealingly connected with the wire.

6. A water return device according to claim 5, characterised in that The through hole is provided with sealing gasket (24), the sealing gasket (24) is provided with wire hole, the wire passes through the wire hole and is electrically connected with the control panel (41), and sealing glue is coated between the wire hole and the wire.

7. The water return device of claim 1, wherein The sealing sleeve (14) is sleeved on the lower outer periphery of the key assembly (42), and the sealing sleeve (14) comprises a supporting portion (141), a connecting portion (142) and an abutting portion (143), the outer diameter of the supporting portion (141) is greater than the outer diameter of the abutting portion (143), the outer diameter of the connecting portion (142) is less than the outer diameter of the abutting portion (143), and the connecting portion (142) is arranged between the supporting portion (141) and the abutting portion (143); The key hole (1111) is arranged as a first stepped hole, the smaller-diameter hole in the first stepped hole is arranged close to the control panel (41), the supporting portion (141) is arranged in the larger-diameter hole in the first stepped hole and is in interference fit with the larger-diameter hole, for supporting the upper part of the key assembly (42); the connecting portion (142) passes through the smaller-diameter hole in the first stepped hole and is in interference fit with the smaller-diameter hole, the abutting portion (143) extends into the cavity and abuts against the control panel (41), the lower part of the key assembly (42) passes through the communication hole at the center of the abutting portion (143) and is electrically connected with the control panel (41), and the key assembly (42) is in interference fit with the communication hole.

8. The water return device of claim 1, wherein The control panel (41) is provided with an indicator lamp, the top of the upper shell assembly (1) is further provided with a light transmission hole (1121), the light transmission hole (1121) is arranged corresponding to the indicator lamp, and a light guide column (13) is arranged in the light transmission hole (1121) and is in interference fit with the light transmission hole (1121).

9. The water return device of claim 1, wherein The control assembly (4) further comprises a mounting frame (43), and the mounting frame (43) is connected with the upper shell assembly (1). The mounting frame (43) is arranged as a U-shaped frame, the control panel (41) is arranged in the U-shaped frame, the opening end of the U-shaped frame is arranged towards the top of the upper shell assembly (1), and a sealing element (6) is arranged between the opening end of the U-shaped frame and the top of the upper shell assembly (1).

10. A gas water heater characterised by, A water return device as claimed in any one of claims 1 to 9.

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